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BUG: KCSAN: data-race in __mod_timer / __mod_timer

write to 0xffff88811ad11760 of 8 bytes by task 3517 on cpu 0:
 __mod_timer+0x5a1/0x840 kernel/time/timer.c:1126
 mod_timer+0x1f/0x30 kernel/time/timer.c:1195
 mod_peer_timer drivers/net/wireguard/timers.c:37 [inline]
 wg_timers_any_authenticated_packet_traversal+0xd0/0x100 drivers/net/wireguard/timers.c:218
 wg_packet_create_data_done drivers/net/wireguard/send.c:247 [inline]
 wg_packet_tx_worker+0xeb/0x330 drivers/net/wireguard/send.c:276
 process_one_work kernel/workqueue.c:3257 [inline]
 process_scheduled_works+0x4ce/0x9d0 kernel/workqueue.c:3340
 worker_thread+0x582/0x770 kernel/workqueue.c:3421
 kthread+0x489/0x510 kernel/kthread.c:463
 ret_from_fork+0x149/0x290 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246

read to 0xffff88811ad11760 of 8 bytes by task 3402 on cpu 1:
 __mod_timer+0x69/0x840 kernel/time/timer.c:1038
 mod_timer+0x1f/0x30 kernel/time/timer.c:1195
 mod_peer_timer drivers/net/wireguard/timers.c:37 [inline]
 wg_timers_any_authenticated_packet_traversal+0xd0/0x100 drivers/net/wireguard/timers.c:218
 wg_receive_handshake_packet drivers/net/wireguard/receive.c:202 [inline]
 wg_packet_handshake_receive_worker+0x4c3/0x5d0 drivers/net/wireguard/receive.c:213
 process_one_work kernel/workqueue.c:3257 [inline]
 process_scheduled_works+0x4ce/0x9d0 kernel/workqueue.c:3340
 worker_thread+0x582/0x770 kernel/workqueue.c:3421
 kthread+0x489/0x510 kernel/kthread.c:463
 ret_from_fork+0x149/0x290 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246

value changed: 0x00000000ffffb0a4 -> 0x00000000ffffb0af

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 3402 Comm: kworker/1:3 Not tainted syzkaller #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: wg-kex-wg0 wg_packet_handshake_receive_worker
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